Few more things before 2.8.0 release

There are couple of things before we can make the release:

• make dist does not work as it reference files that are no longer in the repository (fixed)
• make dist generates tarball without files to use meson build files
• meson dist generates tarball without files to use autotools build files
  • we should decide if we want to use only one or keep few releases with both of them
• there are minor differences in the tarball content from both build systems
  • the fuzz/ is missing from autotools (I think this is not problem as I was not able to build fuzzers with autotools)
  • there is m4/ax_code_coverage.m4 and m4/ax_code_coverage.m4 in the meson dist tarball for some reason

This is mostly question on @elmarco who introduced meson build system.